Ensure https base_url in telegram bot

[bzillins]

Description:

While attempting to resolve a telegram issue I ran into an issue where the base_url was not HTTPS. Added logging to help track down potential issues.

[mention-bot]

@bzillins, thanks for your PR! By analyzing the history of the files in this pull request, we identified @sander76, @azogue and @fabaff to be potential reviewers.

[homeassistant]

Hi @bzillins,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[MartinHjelmare]

I've seen this problem too. I think that some components want the base URL to not contain the https:// part though. TTS perhaps? We should make sure that no components or platforms have conflicting ideas of how the base URL should be constituted.

[pvizeli]

I think in this case it would be better to add a way to use a own URL. So if that is not set it use base url. Can you change that? So you can use hass on port 8123 with base_url but add a portforwarding on external with telegran bot.

@MartinHjelmare no that have no affect also not with TTS

[balloob]

People set their base_url in the http component config. So here we should just use that to make sure that a user is not assuming it will work without https.

This is great 🐬 👍